I am creating a plugin for thermal cam. I need to read some calibration values, which are stored in calibration.txt in OctoPrint-Myplugin/octoprint_myplugin/calibration.txt
open("calibration.txt").read() is not working. I am getting error "IOError: [Errno 2] No such file or directory: 'calibration.txt' "
Any ideas how to read data from .txt?